3.1602.6 Capping Dual-Cooling Up-Ducts

Duct Sealing
Desired Outcome: 
Dual-cooling up-duct Dual-Cooling Up-Duct Piece of duct located between the living space and attic to allow air flow in pressurized homes having evaporative coolers isĀ sealed to prevent leakage
Backing and infill

Backing or infill will be provided as needed to meet the specific characteristics of the selected material and the characteristics of the up-duct opening

A material will be rated for use in duct systems

The infill will not bend, sag, or move once installed

Minimize hole size to ensure successful use of sealant

Ensure closure is permanent and supports any pressure produced by wind or air handler fan

Ensure sealant does not fall out

Sealant selection

Sealants will be continuous and be in accordance with IRC IRC International Residential Code

Select permanent sealant

Ensure sealant meets or exceeds the performance characteristics of the surrounding materials